what is pet wars?

I also had this same question when I realized my cats had "wins and losses". I tried to find the answer on the site but couldn't. My sister later explained that if you go to the main zootoo page, lower down on the right side you'll see two small pictures and it will ask which pet is cuter? If you click on one (the one you're voting for) it takes you to another page where you can continue voting for which pet you think is cuter. Each time you click/vote, pictures of two new pets come up to vote on. What I haven't figured out yet is if they only take the profile pictures of your pets, or the "gallery" photos as well---? It is very fun to vote though -- rather addicting!